All the trains on Seoul Subway Line 9 will all have six cars from today... to ease congestion on the most crowded line.
There had been a mix of four- and six-car trains on the line causing them to get crowded, especially during rush hour.
The line is also on a key route that stops at major transit stations at a much faster speed than other lines
Starting from the end of this month,... the Seoul Metropolitan Government says it also plans to increase the 37 trains currently running on a typical weekday to 40..